crypto/pbkdf-nettle.c

   1 /*
   2  * QEMU Crypto PBKDF support (Password-Based Key Derivation Function)
   3  *
   4  * Copyright (c) 2015-2016 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qapi/error.h"
  23 #include "crypto/pbkdf.h"
  24 #include "nettle/pbkdf2.h"
  25
  26
  27 bool qcrypto_pbkdf2_supports(QCryptoHashAlgorithm hash)
  28 {
  29     switch (hash) {
  30     case QCRYPTO_HASH_ALG_SHA1:
  31     case QCRYPTO_HASH_ALG_SHA256:
  32         return true;
  33     default:
  34         return false;
  35     }
  36 }
  37
  38 int qcrypto_pbkdf2(QCryptoHashAlgorithm hash,
  39                    const uint8_t *key, size_t nkey,
  40                    const uint8_t *salt, size_t nsalt,
  41                    unsigned int iterations,
  42                    uint8_t *out, size_t nout,
  43                    Error **errp)
  44 {
  45     switch (hash) {
  46     case QCRYPTO_HASH_ALG_SHA1:
  47         pbkdf2_hmac_sha1(nkey, key,
  48                          iterations,
  49                          nsalt, salt,
  50                          nout, out);
  51         break;
  52
  53     case QCRYPTO_HASH_ALG_SHA256:
  54         pbkdf2_hmac_sha256(nkey, key,
  55                            iterations,
  56                            nsalt, salt,
  57                            nout, out);
  58         break;
  59
  60     default:
  61         error_setg_errno(errp, ENOSYS,
  62                          "PBKDF does not support hash algorithm %d", hash);
  63         return -1;
  64     }
  65     return 0;
  66 }